2 Mark on 2 1/2 penny Germania, block of four with following overprint types AIa with AF IV, AIa, AIa BI with AF III and AIb, mint never hinged, horizontal perforation prefolded, faultless condition, photo expertize Matthew buck BPP (2024) \"the quality is perfect. \", Michel 580.- (free of premium for type pairs, because these by Michel not valued are)